Bicycle-lock



(No Model.)

l H. W. COTTON.

BICYCLE LOCK.

- No. 596,396. Patented Deo. 28,1897.

wilgzsscs mm @y UNITED STATES HOI/YARD W'. COTTON, OF ROCHESTER, NEW YORK.

BICYCLE-LOCK.

SPECIFICATION forming part of Letters Patent No. 596,396, dated December 28, 189'?. Application tiled December 31,1896. Serial No. 617,631. (No model.)

T0 all whom. it may concern:

Be it known that I, HOWARD W. COTTON, a citizen of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented a new and useful Bicycle-Lock, of which the following is a specification.

This invention relates'to locks especially designed for securing bicycles and like road vehicles or machines when not required for immediate service and which embody in their construction an arm to be turned across the path of a wheel or moving part, so as to secure the same against rotation, said arm being held in the projected position by locking devices which form the basis of the present invention.

For a full understanding of the merits and advantages of the invention reference is to be had to the accompanying drawings and the following description.

The improvement is susceptible of various changes in the form, proportion, and the minor details of construction without departing from the principle or sacrificing any of the advantages thereof, and to a full disclosure of the invention an adaptation thereof is shown in the accompanying drawings, in which Figure l is a perspective view of a lock ernbodying the features of this invention. Fig. 2 is afront view thereof, the dotted lines showing the position of the looking-arm when the latter is turned out ofV the path of the moving part or wheel. Fig. 3 is a longitudinal section showing the clamp in elevation and the relation of the parts when the lockingarm is turned out of the path of the moving part. Fig. 4 is a longitudinal section showing the relation of the tumblers when the rotary bolt is released. Fig. 5 is a View similar to Fig. 4., showing the rotary bolt locked. Fig. 6 is a section on the line X X of Fig. 5, looking to thev right. Fig. 7 is a section on the line Y Y of Fig. 3, looking to the right.

Corresponding and like parts are referred to in the following description and indicated in the several views of the drawings by the same reference-characters.

The lock comprises a clamp 1, a case 2, containing the locking mechanism and having the clamp rigidly connected therewith, and a locking-arm 3. The case is formed with an offset 4, to which one end of a flexible band 5 is attached and which has longitudinal perforations for the passage therethrough of clampscrews 6, by means of which the clamp-band 5 is drawn tightly about a fork member or frame-bar of a machine or part to which the lock is to be applied. A' block 7 is secured to the free end of the clamp-band 5 and has threaded openings to receive the threaded ends of the clamp-screws 6, by means of which the band 5 is caused to firmly grip the part to which the lock is applied. By having the clamp-band 5 flexible it will readily conform to the shape of the frame-bar, fork, or other part to which it is fitted and engage the same frictionally throughout its extent, thereby preventing any movement of the lock upon the part when properly applied.

The case has longitudinal openings 8 at its inner end to receive tumblers or pins 9, which are held projected by springs 10, located at the inner ends of theopenings and exerting an outward pressure against the inner ends of the said tumblers. The rotary bolt 11, revolubly fitted in the outer end of the case, has openings which are adapted to register with the openings 3 and has pins or tumblers 12 fitted therein, and whichare of unequal length, so as to prevent the opening of the lock except by the use of a key especially tted thereto. Slots or key-openings 13 eX- tend outwardly from the openings receiving the pin-tumblers 12 to provide passages for the entrance of the key 14 when it is required to open the lock. The locking-arm 3 is secured to or formed with the rotary bolt, and

its inner end is of circular outline and of such-relative size as to overlap the end of the case and the heads of the clamp-screwsv 6, so as to prevent a withdrawal of the latter by unauthorized parties. A semicircular notch 15 is formed in an edge of the circular end of the locking-arm, and when the latter is'released it can be turned so as to bring the notch in register with the clamp-screws, thereby making provision for placing them in position or removing them, as may be required. The notch 15 is so disposed that when the arm 3 is turned across the path of the part to be secured it will be out of register with the clamp-screws,as clearly indicated IOO in Figs. 1 and 2. A key 1U is let into a transverse korf in the case and is secured thereto by calking or in any other substantial manner, and its inner edge 17 enters a transverse groove 1S in the rotary bolt and holds the latter in place, and the projecting portion 17 forms a ward to enter a notch in an edge of the key 1-1, so as to retain the latter in place when turning the rotary bolt from a locked to an unlocked or normal position, and also increases the difficulty of opening the lock by a key or other means not specially constructed for the purpose. A packing-ring or rubber gasket 19 is interposed between the end of the case and the inner end or head of the locking-arm 3 and is seated ina groove formed in the end of the case. This packing renders the lock proof against dust and moisture.

The key 14: is cleft, forming prongs or inembers 20, of unequal length, corresponding with the differential length of the pin-tumblers 12, whereby the combined length of the prongs 2O and the corresponding tumblers 12 is equal, so that when the key is thrust into the lock the pin-tu niblers 9 will be depressed to a plane corresponding with the joint formed between the rotary bolt and the opposing end of the case, thereby admitting of the rotary bolt turning, so as to withdraw the locking-arm 3 from the path of the moving part. The ends of the prongs 2O are notched to receive central projections at the outer ends of the tumblers 12, whereby an additional safeguard is provided against the surreptitious opening of the lock.

A spring-actuated dog 21 is located in an opening formed at the inner end of the case, and its outer end is made tapering or rounding, so as to project a short distance into an openin g in the rotary bolt provided to receive a pin-tumbler, so as to hold the locking-arm in a normal position when withdrawn from the path of the wheel or moving part, thereby preventing its accidental displacement when the machine is passing over rough places or otherwise subjected to vibration. This springactuated dog acts as a retainer and positively holds the locking-arm in a predetermined position and against accidental displacement, but does not prevent the turning of the said arm on the application of sufficient force thereto.

The lock is intended to be applied to the fork of a bicycle, so that the locking-arm 3 can be projected across the path of the spokes adjacent to the rim, thereby preventing the turning of the front wheel when the machine is left standing or not required for immediate service.

Having thus described the invention, what is claimed as new is 1. In a lock for bicycles and like machines, the combination of a flexible clamp-band, a lock applied to one end of the clamp-band, an offstanding part at the opposite end of the clamp-band and provided with a threaded opening, a clamp-screw for connecting the lock and said offstanding part and drawing the clamp-band about a frame-bar of the machine, and a locking-arm having a portion projecting over the head of the clamp-screw to prevent loosening thereof when the lock is in operative position, substantially as set forth.

2. In combination, a lock-case having an offset portion, a flexible clamp-band secured at one end to the said offset, a block applied to the opposite end of the clamp-band and having a threaded opening, a clamp-screw passing through the said offset and entering the threaded opening of the block, and a locking-arm for securing the clamp-screw in place, substantially in the manner set forth.

3. In alock, the combination of a case having a series of longitudinal openings at its inner end, spring-actuated tumblers located in the said openings, a rotary bolt secured in the outer end of the case and having longitudinal openings at its inner end corresponding in number and position with the longitudinal openings of the case, and having longitudinal slots in its sides eXtendin g outward from the longitudinal openings, forming keypassages which are closed at their outer side by the inner wall of the ease, key-operated tumblers of unequal length fitted in the said openings of the rotary bolt, and a lockingarm secured to the outer end of the rotary bolt, substantially as and for the purpose set forth.

4E. In a lock, the combination of a case, spring-actuated tumblers located in openings of the case, a rotary bolt fitted within the case and having a locking-arm, a key secured in a transverse groove of the case and extending into a corresponding groove of the rotary bolt to hold the latter in place, form a ward, and provide a means for holding the operating-key in place when opening the lock, and key-operated tumblcrs located in openings provided in the rotary bolt, sub stantially as specified.

5. In a lock, the combination with a case having a spring-actuated tumbler, a rotary bolt revolubly secured within the case and bearing a locking-arm, and a key-operated tumbler carried by the rotary bolt, of a spring-actuated dog located in an opening of the case to one side of the aforesaid tumbler and adapted to enter the opening of the rotary bolt provided to receive the said tuinbler to hold the locking-arm normally out of action and against accidental displacement, substantially as and for the purpose set forth.

6. A lock for bicycles and like machines, comprising a case having an offset, a fiexible clamp-band secured to the offset at one end, a block at the opposite end of the clampband having a threaded opening, a clampscrew for adjustably connecting the block with the aforesaid offset, spring-aetuated tumblers located within the case, a rotary bolt operating within the case, key-operated tumblers of unequal length carried by the IOO IIC

rotary bolt, a spring-actuated retaining-dog In testimony that I claim the foregoing as for holding the rotary bolt in a normal posimy own I have hereto affixed my signature in 1o tion,`and a locking-arm applied to the rotary the presence of two Witnesses.

bolt and having its inner end expanded and 5 extending over the head of"theolampserew HOWARD W COTTON' to prevent tampering therewith\when the Witnesses: looking-arm is performing servioefsubstan- GEORGE M. BRADLEY, tially as set forth. BYRON J. SEELEY. 

